STRATEGIES FOR UTILIZING OVERPROCESSED SOYBEAN-MEAL - II - LYSINE SUPPLEMENTATION

Four experiments were conducted determine the amount of lysine needed to overcome the negative effects of feeding overprocessed Soybean meal (SBM) to broiler clicks. Overprocessed: SBM reduced 15-day body weigh t and;increased feed:grain ratio. The addition of graded levels of lys ine significantly (P < .05) increased body weight to a level similar t o that Of controls, thus overcoming the effects of overprocessing. In Experiment 1, feeding moderately overprocessed SBM (55% protein solubi lity [PS]) required the addition of 0.082% lysine to overcome the effe cts of overprocessing, In Experiments 2, 3, and 4, when feeding slight ly overprocessed SBM (68, 66, and 66% PS), the addition of 0.072, 0.03 2, and 0.054% lysine, respectively was required to achieve the same bo dy weight as control groups. On the basis of these studies, it is sugg ested that overprocessed SBM can be included in practical diets if the PS is known and adequate supplemental lysine is incorporated in the r ation.